Elector or injector



E. 0. CARTWRIGHT'.

-EJECTOR 0R INJECTOR.

APPLICATION FILED IuLv 26, 1919. 1,369,398. Patented Feb. 22,1921.

2 sIIEE1$ SHEET l2.

cruise srATEs Param ortica.

nRNi'iscr o.. cAR'rWRrGHT, or SPRINGFIELD, omo, AssIGNoR To cHARLEs F.

Y GARDNER, on SPRINGFIELD, omo.

Specification of Letters Patent. `Patented Feb. `22 1921.

Application led July 26, 1919. Serial No.`313,4 90.1` Y Y To all whom tm/ay concern: -Be it known thaty I, vERNEST O. CART- wRIGI-ir, a citizen ofthe United States, residing at Springfield, in the county of Clark and tate of Ohio, have invented a new and Improved Ejector or Injector, of which the following is a specification.

This invention relates to tors or injectors, wherein the motive iiuid is a liquid and the material which is drawn up by way of the suction duct is also a liquid but containing more or less solid and abrasive material, said ejectors (or injectors) being especially adapted for use in portable ypumping apparatus of the general type disclosed in my application Serial No. 259,668, filed October 25,1918. l..

When injectors of the general type used in apparatus such as disclosed in my application aforesaid, are worked in situations where. the supply or pressure fluid is screened "away from the mass being lifted bythe ejector, the size of the openings inV the screen is an important factor in the operation of the jet. Under certain conditions, a screen of suiiiciently smallmesh to properly protect the jet from obstructions will become so clogged with the lighter constituents of the mass that, without the use of cleaning arrangements, not enough water will pass through to ,supply the jet, which condition can be remedied only by the emr ployment of larger openings inthe screen used. -1

l The aperturesgfor thel passageof pressure fluidn the cone'.` type of jet' (see my appli' cation Serial No, 281,272, filed Marchf?, 1919) lare of comparatively restricted area and require the use of a relatively small mesh screen .to properly protect it, and increasedv size ofapertures would `call for greater quantity of pressure fluid in order to maintain efciency, which greater quantity of fluidwould have to come through larger openings in the screen, alll resulting in increased duty of the operating mecha- 'To make possible the use of an' aperture of sufiicient area to give the efficiency of the cone type jet, and at the same time avoid' the poor results of the jets wherein the suction is frequently brokenl down by thediffusion and deiiectionof the suction columns, when entering from-one side, I have invented the construction herein shown and described.

the art of ejec- The pre-sent invention includes those novell features of construction, combination and arrangement of parts,'all of which will be fully described and specifically pointed out in the appended claims, reference being had to the accompanying drawings, in which:

Figurel is a detail elevation of a `portion of'aA pumping apparatusemploying the invention.

lFig. 2 is an enlarged vertical section of the ejector which constitutes one of the specific embodiments vofthe present invention. Fig. 3 is an inverted plan view of the discharge duct. Fig. 4 is an inverted plan of the parts Shown in Fig. 2. Fig. 5 is asection on the line 5-5-of Fig. 2. f f Fig. 6 is a detail vertical section of another specific embodiment of the invention (differing from the preceding form in having 'but asingle suction duct).

Fig. 7 isa detail vertical section' of an- Y other form, similar t0 the form shown in Figs. lto 5, inclusive, but in which 'the combined areas of the several suction ducts ape proximate the area of the discharge duct or pass.

By reference to the accompanyingdrawings in whichlike numerals of reference designate like parts in all of the figures, it will be observed that 1 ,represents the separation j 1 tank which'is lprovided with a screen partition 2 to strain the solids from the liquid, the liquid being removed from the chamber in which it collects` through a duct 3 which connects with the intake 4 of the centrifugal pump 5, the outlet 6 of which delivers into the intake of lthe base portion 7 of the ejector-injector and passes therefromthrough the duct 21 back into the solids .compartment ofthe tank, taking with' it the material ynipples of the `suction pipegor hose (not valve 12.

shown). The pass 9 is controlled by a The base 7 is provided on its upper surface with a flange 13 to fit in a corresponding re cess in the flange or base portion 15 of the discharge duct, the latter being provided with a bulbular vacuum chamber 16 into whichthe j et opening 11 discharges centrally and into which the suction duct 22 discharges to one side of the jet. aperture 11, the base portion 15 of the discharge duct being cored `at 22X to form a continuation of the channel of the suction duct 22 (see Fig. 2).

Thedischarge duct is provided with a straightway pass 17 from the )bulbular vvacuum chamber 16 and is also provided with an expansion pass 18 oi truste-conical form having its end oit lesser diameter com# v municating with the pass 17 and its end of greaterdiameter communicating with the straightway pass 19infwhich a cut off valve 20 is located for the purposes of shutting oil the discharge duct, when it is desired to blow-out or clean thesuction duct.

Itwill be noted from the foregoing that the pressure fluid is supplied to the jet by y thesuitableepump or accumulator 5 and is .forced through the central opening 11 from the pressure chamber 10 into the vacuum chamber 16 where thesuction column from the duct 22 is picked up by it and both are propelled by the force behind the pressure 'fluid through the straight cylindrical pass 17 into the conically divergent pass 18 between thestraight section 17 and the final disy charge .19. Y

tion aperture or apertures.

.The vacuum chamber `has a base large enough to accommodate, around the center at which the jet enters) the location, at any desired point, of one or more openings 22 (or 221'see Fig. 7 ),'leaving a vvall of scant section between the j et aperture and the suc- This brings the suction column into the bottom of the vacuum chamber as *nearly parallelV to the direction ofkthe'jet as possible. Y

At all lpoints around the center of the chamber-except where the suction duct en. ltersythe line of the inside wall 1s turned toward the center witha radius which makes the wall inclose a bulbular-shaped cavity that equalizes the vacuum at vall points :around the center, when the jet is'in opera* tion and the suction is working.

Now toillustrate, if a fragment thesize of the' lsuction duct is brought into the vacuum chamber by the action of the et,it

will bedeflected toward the jet by contact with the inside yWall ot the chamber and, by thecontinued action ofthe'jet luid, vvill be carriedin-to the pressure streamiand away, thesha'pe of Athe chamber tending to consolidate the suction and pressure streams rather than diffuse either.`

The proximity'of the suction aperture to the jet and the close approach to parallelism with the direction of the pressure water unite to afford an efficiency approximate to that of 'the enveloping cone jet, (see my application ejectors and allowingthe use of a jet aper-' tureA large enough to remain unobstructed by matter which would not be screenedV out of the supply fluid, when drawn, by the m0- tive pump, through a screen containing the openings of sufficient area to prevent clogging, when working in the peculiar mass for the handling of which this jet was invented. v

f One suction duct 22 (see Fig. 6) may alone be employed and it may be located at any desov sired position around the center, or several ducts 22l (see Fig. 2) of areas equal to that of the discharge duct may be provided and, in use all but oneL may be plugged, the remaining one being that towhich the suction hose (not shown) is connected, the several suction ducts 22a may be employed together (there being separate suction hose vconnected to the respective vducts 22a, when in use) but, when this Yform is used, I preferto have the combined areas of the ducts'22a ap,-k

proximate that of the discharge duct. Y

`VVhile I have illustrated several specific embodiments of the invention, I desire it understood thatother 'changes inthe details of construction, combination andy arrangement of parts may be made without departing from the spirit Aof the invention or the scope of the appended claims.

What I claim is: ,Y f Y.

1. In apparatus of the character described, a base provided with a central pressure jet aperture and a suction duetto one side of theV same, a discharge duct detachably secured to the base andV having a bi'ilbular vacuum chamber and a delivery pass leading therefrom, said suction duct and said `jet aperture beingl directedv lto dischargeinto said vacuum Chambensaidfbase having a recelving chamber and a shuto valve r`in vsaid receiving chamber, said receiving cham-v ber beingin communicationwith saidjet aperture and means whereby said base may be secured to the outlet of, a' centrifugal pump with the Yreceiving chamber in register with the outlet 'of the pump. 't

' 2. In apparatus of the Iclass escribed, a base provided with a central 'pressure jet aperture and a suction duct' to one sidelof ythe same, a discharge duct detachably Tse? cured to the base and 'having' a bulbular vacuum chamber and fa delivery pass leading therefrom, said suction duct and "said jet vaperture being Vdirected to discharge into said vacuum chamber, said base having a receiving chamber and. a shutoff valve iin said receiving chamber,said receiving chamber being 'in communication with said Vjet aperture, means whereby said base may be secured to the outlet of a centrifugal pump with the receiving chamber in register with the outlet of the pump, and a cock in said discharge duct.

3. n an apparatus of the'charac'ter described, a base member provided with a central pressure jet aperture and at least one suction duct to one side of the same, a discharge duct, said base and said discharge duct having interengaging portions, a gasket between said base and discharge duct, means for securing said discharge duct to said base, said discharge duct including a bulbular vacuum chamber adjacent to said base into which said jet aperture and saidsuction ducts lead and discharge, said discharge duct having a delivery pass leading from said vacuum chamber' and a shutof cock in said deliverypass.

a. In an apparatus of the character described, a base member provided with a'cen- Y tral pressurev jet aperture and atleast one suction duct to one side of the same, a discharge duct, said base and said discharge duct having interengaging portions, a gasket between said base and discharge duct, means for securing saiddischarge duct to said base, said discharge duct including a bulbular vacuum chamber adjacent to said base into which said `jet aperture and said suction ducts lead and discharge, said discharge duct having a delivery pass leading from said vacuum chamber, ashut-off cock in said delivery pass, said base including a receiv.

ing chamber, a shutoff valve in said receiving chamber and a duct between said receiving chamber and said jet aperture, said base adapted to be secured to thedischarge outlet of a centrifugal pump with said receiving chamber in communication with the Y p pump outlet. g Y

" ERNESTO. CARTWRIGHT. 

